18056620 has 24 divisors (see below), whose sum is σ = 37999584. Its totient is φ = 7207296.

The previous prime is 18056617. The next prime is 18056653. The reversal of 18056620 is 2665081.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15912 + ... + 17008.

It is an arithmetic number, because the mean of its divisors is an integer number (1583316).

Almost surely, 2^18056620 is an apocalyptic number.

18056620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18056620 is an abundant number, since it is smaller than the sum of its proper divisors (19942964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18056620 is a wasteful number, since it uses less digits than its factorization.

18056620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1929 (or 1927 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 18056620 is about 4249.3081789863. The cubic root of 18056620 is about 262.3486413898.

The spelling of 18056620 in words is "eighteen million, fifty-six thousand, six hundred twenty".